JP2003173734A - Manufacturing method of plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a plasma display panel in which deterioration of panel characteristics can be suppressed. <P>SOLUTION: This is a manufacturing method of a plasma display panel in which a pair of substrates arranged with a group of electrodes are arranged opposed to each other so as to form a discharge space between the substrates and the surroundings of the substrates are sealed with a sealing member. After a rod-shape glass 11 is fixed closely on a prescribed position of one side substrate 1, the glass 11 is melted in the state that this glass 11 is clipped by the pair of substrates 1, 5, thereby, the surroundings of the substrates 1, 5 are adhered with the glass 11. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a large screen, thin type,
The present invention relates to a method for manufacturing a plasma display panel (hereinafter referred to as PDP) known as a lightweight display device.

[0002]

2. Description of the Related Art In this PDP, ultraviolet rays are generated by gas discharge, and phosphors are excited by the ultraviolet rays to emit light to perform color display. The display cell partitioned by the partition is provided on the substrate, and the phosphor layer is formed on the display cell.

This PDP is roughly classified into A drive type.
There are C type and DC type, and there are two types of discharge type, a surface discharge type and a counter discharge type, but at present, the mainstream of PDPs is a three-electrode structure due to high definition, large screen and ease of manufacturing. In the surface discharge type, the structure has a pair of display electrodes that are adjacent to each other in parallel on one substrate, and address electrodes arranged in a direction intersecting the display electrodes on the other substrate, and a partition wall.
Since it has a phosphor layer, the phosphor layer can be made relatively thick, and is suitable for color display by the phosphor.

Such a PDP is capable of high-speed display as compared with a liquid crystal panel, has a wide viewing angle, is easy to be upsized, and is self-luminous so that display quality is high. Therefore, it has recently attracted a lot of attention among flat panel displays, and has been used for various purposes as a display device in a place where many people gather and a display device for enjoying a large-screen image at home.

Hereinafter, regarding a general AC type PDP,
This will be described with reference to FIGS. 4 and 5. As shown in FIG. 4, a plurality of stripe-shaped display electrodes 2 forming pairs of scan electrodes and sustain electrodes are formed on a transparent front substrate 1 such as a glass substrate, and the electrode groups are covered. Is formed on the dielectric layer 3, and the protective film 4 is formed on the dielectric layer 3.
Are formed.

A plurality of columns covered with an overcoat layer 6 are formed on the rear substrate 5 facing the front substrate 1 so as to intersect the display electrodes 2 of scan electrodes and sustain electrodes. Stripe-shaped address electrodes 7 are formed. A plurality of partition walls 8 are arranged on the overcoat layer 6 between the address electrodes 7 in parallel with the address electrodes 7, and a phosphor layer 9 is provided on a side surface between the partition walls 8 and a surface of the overcoat layer 6. There is.

The substrate 1 and the substrate 5 are a display electrode 2 and an address electrode 7 which are scan electrodes and sustain electrodes.
Are arranged so as to be substantially orthogonal to each other, and are opposed to each other with a minute discharge space interposed therebetween, and the periphery is sealed, and one kind of helium, neon, argon, and xenon or a mixed gas is discharged into the discharge space. It is enclosed as a gas. Further, the discharge space is partitioned into a plurality of partitions by partition walls 8 to provide a plurality of discharge cells at which the intersections of the display electrodes 2 and the address electrodes 7 are located, and each of the discharge cells has red, green, and blue. The phosphor layers 9 are sequentially arranged for each color so that

FIG. 5 shows the electrode arrangement of this PDP. As shown in FIG. 5, the scan electrodes, the sustain electrodes and the address electrodes have a matrix structure of M rows × N columns, and M rows in the row direction. Scan electrodes SCN1 to SC
NM and sustain electrodes SUS1 to SUSM are arranged, and N columns of address electrodes D1 to DN are arranged in the column direction.

In a PDP having such an electrode structure,
By applying a write pulse between the address electrode and the scan electrode, an address discharge is generated between the address electrode and the scan electrode, and a discharge cell is selected, and then the voltage is alternately inverted between the scan electrode and the sustain electrode. By applying a periodic sustain pulse, a sustain discharge is generated between the scan electrode and the sustain electrode, and a predetermined display is performed.

[0010]

By the way, in such a PDP, when the front and rear substrates are adhered to form a panel, low melting glass is processed into powder, and an organic solvent is added to paste. The liquefied material was applied to a predetermined position on one of the substrates by a method such as printing or a dispenser, dried, and then the substrates were combined and heat-melted for sealing.

On the other hand, it is considered that impurities such as water and CH-based gas remain inside the panel as one of the factors that deteriorate the panel characteristics.
Among the water and bubbles contained in the low melting point glass, and the organic solvent added when forming the paste, those that remain during drying may be released during sealing and taken into the panel.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a manufacturing method capable of suppressing deterioration of panel characteristics.

[0013]

In order to achieve the above object, according to the present invention, after a stick-shaped sealing member is fixed to a predetermined position of one substrate, the sealing member is sandwiched between the pair of substrates. The manufacturing method is characterized in that the peripheral portion of the substrate is adhered by the sealing member by melting the sealing member in the state.

As a result, impurities such as water and organic substances released from the sealing member during sealing and remaining in the panel can be sufficiently reduced, and the panel characteristics can be improved. Moreover, since the substrate is sealed after the sealing member is aligned and fixed to the substrate, the sealing member does not move when the substrate is assembled, and no leak occurs after the sealing.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, according to the first aspect of the present invention, a pair of substrates on which electrode groups are arranged are opposed to each other so that a discharge space is formed between the substrates, and a peripheral portion of the substrates is disposed. In a method of manufacturing a plasma display panel configured by sealing with a sealing member, a rod-shaped sealing member is fixed at a predetermined position on one substrate, and then the sealing member is sandwiched between the pair of substrates. It is characterized in that the peripheral portion of the substrate is adhered by the sealing member by melting the sealing member in the state.

Further, in the present invention, when the rod-shaped sealing member is fixed to a predetermined position of the substrate, the rod-shaped sealing member is provided on each side of the peripheral portion of the substrate, and one end surface of the sealing member is the other. The sealing member is arranged so as to abut on the outer peripheral surface of the end portion of the sealing member and the outer peripheral surface of the other end portion abuts the end surface of the other sealing member.

Further, as a method of fixing the sealing member to the substrate, welding by laser irradiation or ultrasonic irradiation,
Adhesion with an adhesive is used. Further, when the sealing member is fixed to the substrate with the adhesive, the adhesive is applied to the end portion side of the substrate which is the non-display surface.

Hereinafter, a PDP according to an embodiment of the present invention
The manufacturing method will be described with reference to the drawings of FIGS.

FIGS. 1 and 2 are schematic views showing a state in which the steps of the main part are carried out in the method for manufacturing a PDP according to one embodiment of the present invention, and FIGS. The same numbers are given to the same portions as the portions.

In the figure, 11 is a rod-shaped glass serving as a sealing member, and this glass 11 heats a low-melting glass having a softening point of 600 ° C. or lower to 600 ° C. or higher to sufficiently remove bubbles and impurity gas. It is defoamed and then processed into a rod shape in advance, and is softened at a temperature lower than that of the substrates 1 and 5. The glass 11 is welded to the substrate 1 by placing and arranging the glass 11 at predetermined positions in the peripheral portion of the substrate 1 on the front surface side in combination in a checkerboard pattern, and by irradiating the laser with the laser irradiating device 12 at several places.

After that, the substrates 1 and 5 are aligned and arranged so that the glass 11 arranged in combination in the shape of a cross is sandwiched between the substrates 1 and 5, and the substrates 1 and 5 are arranged by a clip made of a metal having a spring property. After sandwiching the peripheral part of the substrate so as to elastically press it, in this state, the glass 11 is heated and melted at a temperature not lower than the softening point and not higher than 600 ° C. by a heater so that the peripheral parts of the substrates 1 and 5 are covered with the glass 11. To glue. After that, a discharge gas is filled in the discharge spaces in the substrates 1 and 5 to complete the PDP.

Here, in the present invention, as shown in FIG.
When fixing the rod-shaped glass 11 at a predetermined position of the substrate 1,
Bar-shaped glass 11 is provided on each side of the peripheral portion of the substrate 1,
One end face of the glass 11 is abutted against the outer peripheral face of the other glass 11 and the other outer peripheral face of the other glass 11
Are arranged so that the end faces of the glass 11 are butted against each other, and it is possible to reduce the occurrence of leakage from the spliced portion of the glass 11.

In the above embodiment, an example in which the glass is fixed to the front side substrate in advance has been described, but of course, it may be fixed to the rear side substrate. Further, as a method of fixing, besides welding by laser irradiation, welding by ultrasonic irradiation may be used.

In addition to this welding, the glass may be fixed in advance by adhesion with an adhesive material. in this case,
As shown in FIG. 3, when the glass 11 is fixed to the substrate 1 with the adhesive material 13, the adhesive material 13 is applied and fixed to the end portion side of the substrate 1 which is the non-display surface in the panel to bond the glass 11. The effect of preventing the gas from the material 13 from entering the inside of the panel can be obtained. Further, in the case of fixing with the adhesive material 13, before sealing the substrate with the glass 11,
By performing the process of burning out the adhesive material 13 at a temperature of about 200 ° C. to 600 ° C., which is lower than the softening point of the glass 11, it is possible to prevent the gas from the adhesive material 13 from entering the inside of the panel.

[0025]

As is apparent from the above description, according to the PDP manufacturing method of the present invention, the substrate is sealed by using the sealing member which is preformed and does not contain the impurity gas or the bubbles. Further, it is possible to obtain a PDP with less residual impurity gas, and it is possible to improve panel brightness and color temperature, and suppress deterioration of panel characteristics such as voltage stabilization.
Moreover, after aligning and fixing the sealing member to the substrate,
It is sandwiched between substrates, and the sealing member is heated and melted in this state to bond the substrates, and the position of the substrate and the sealing member can be accurately and easily aligned, which ensures reliable sealing. The effect of being able to do is obtained.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a state in which a main step in a method of manufacturing a plasma display panel according to an embodiment of the present invention is performed.

FIG. 2 is a schematic plan view of the same.

FIG. 3 is a cross-sectional view of a main part showing a state in which glass is fixed with an adhesive material.

FIG. 4 is a schematic perspective view showing a plasma display panel.

FIG. 5 is a wiring diagram showing an electrode arrangement structure of the plasma display panel.

[Explanation of symbols]

1, 5 substrates 11 glass 12 Laser irradiation device 13 Adhesive

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshiki Sasaki             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Masafumi Okawa             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Kazuya Hasegawa             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Tetsuya Shiratori             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Katsuyoshi Yamashita             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 5C012 AA05 BC03                 5C040 FA01 HA01 KA08 KB11 MA23

Claims (5)

[Claims] 1. A plasma display panel configured by arranging a pair of substrates on which an electrode group is arranged so as to face each other so that a discharge space is formed between the substrates, and sealing the peripheral portion of the substrates with a sealing member. In the manufacturing method of 1., after fixing a rod-shaped sealing member to a predetermined position on one of the substrates, the peripheral portion of the substrate is melted by melting the sealing member while sandwiching the sealing member between the pair of substrates. A method of manufacturing a plasma display panel, which comprises bonding with a sealing member. 2. When sticking a rod-shaped sealing member to a predetermined position on a substrate, a rod-shaped sealing member is provided on each side of the peripheral portion of the substrate, and one end surface of the sealing member is the other sealing member. The method for manufacturing a plasma display panel according to claim 1, wherein the plasma display panel is arranged so as to be brought into abutment with an outer peripheral surface of an end portion of the other end and an end surface of another sealing member is abutted with an outer peripheral portion of the other end. 3. The method for manufacturing a plasma display panel according to claim 1, wherein the method for fixing the sealing member to the substrate is welding by laser irradiation or ultrasonic irradiation. 4. The method of manufacturing a plasma display panel according to claim 1, wherein the method of fixing the sealing member to the substrate is adhesion with an adhesive material. 5. The method of manufacturing a plasma display panel according to claim 4, wherein when the sealing member is fixed to the substrate with the adhesive, the adhesive is applied to the end portion side of the substrate which is the non-display surface.